Archived posting to the Leica Users Group, 2007/03/13

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Subject: [Leica] M8 IR FIlter First Impressions
From: robert.rose at mac.com (Robert Rose)
Date: Tue Mar 13 17:49:55 2007
 
First of all, I think the only image you can't fix is the one you  
didn't take.

First impressions on a Tri-Elmar is that this filter works just fine,  
as is, with no coding.  I can't see any cyan vignetting in "regular"  
photos.  So, to push the thing I shot at the 28mm setting through an  
ExpoDisk to get a clean white.  Then in Camera Raw I boosted the  
exposure, and sure enough, there was some cyan vignetting.  It looks  
like the image in the 2/2007 issue of LFI, p. 44.

Then I repeated this without the filter.  Same vignetting this time,  
but not cyan.

Then, I used Camera Raw to remove the vignetting in both images.   
Bingo!  Cyan gone, vignetting gone.

Conclusion:  put the filters on now and shoot to your heart's  
content.  Stop testing, keep shooting.  Reevaluate when Firmware 1.10  
is released.

Cheers
Bob Rose